The WBCTB3-839-857.5-860.5-879-50 from Wainwright Instruments is a Band Pass Filter with Frequency 857.5 to 860.5 MHz, Bandwidth 3 MHz, Center Frequency 859 MHz, Insertion Loss 1.25 to 1.5 dB, Rejection 50 dB. Tags: Module with Connectors, Cavity Filter. More details for WBCTB3-839-857.5-860.5-879-50 can be seen below.